Impact crusher



March s, 1940. E, B, MONS 2,192,606

IMPACT CRUSHER Patented Mans, 1940y l i n urrED STATES PATENT OFFICE.

`2,192,606 IMPACT caUsnEn.

Edgar B. Symons, Hollywood, Calif., assignmto Nordberg Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Application January 17, 1938, Serial No. 185,278

` 11 claims (ci. azi-4c) My invention relates to an improvement in imbearing races, l0. Keyed to the .shaft id by pact Crushers and has for one purpose the prothe key' l5 s the hub 0I' body Portion generally vision of such a crusher in which the particles indicated as I6 which has an outer generally wi11 be crushed with a minimum of slippage on cylindrical portion Il connected t0 it for exthe face of the impact members. ample by a web or intermediate portion I8. It 5 Another purpose is the provision of improved is provided also with a plurality of outer exbearing or supporting means for the rotor of tensions I9 having faces 20 herein indicated as such a crusher. somewhat rearwardly inclined.

Another purpose is the provision of improved At each end of the member I6 and abutting 10 impact members for such a Crusher. against the edges of the member il are rings 2l, 10

Another purpose is the provision of improved the structure being tied together for example by spout means for such a Crusher. bolts 22 with nuts23, the parts being appropri- Another purpose is the provision of improved ately apertured to receive them. Each such ring means for securing the impact members in po- 2l is shown as having a plurality of 'apertures sition. 24, each such aperture having an inclined wedge l5 Other objects will appear from time to time face 25. Seated against the faces of` the in the course of the specification and claims. members I9 are impact members 26, each such The present application is a continuation in* impact member having at each end an end part of my co-pending application Serial No. flange 2l. Preferably the impact member. so 710,592 which was filed February 10, 1934, now formed is flat and of uniform thickness through- 20 Patent No. 2,110,851'. out, including the flanges 2l. The partsare so I illustrate my invention more or less diagramproportioned that the flanges 2l' penetrate the matically in the accompanying drawings whereapertures 24. In order to lock the impact memin: f bers in position I employwedge members as Figure 1 isa vertical transverse section; shown for example in Figure 2, each one of Figure 2 is a. detail; which includes a wedge portion 28 adapted to Figure 3 is a section on th line 33 of Figseat in the aperture 2d and having a Wedge ure 1; face 29 opposed to the face 25.

Figure 4 is a section on the line 4-4 of Flg- It will be understood that as the rotor rotates ure 1; centrifugal force will tend to move the wedge Figure 5 is a section on line 5 5 of Figure 4; outwardly with the face 29 sliding against the and face 25 of the ring 2i. The result will be to Figure 6 is a detail. v force the opposite side 30 of the wedge forcibly Like members are indicated by like symbols against the face of the adjacent ange 2'! of the throughout the specification and drawings. impact member, as shown for example in Figure Referring to the drawings, l generally indi- 4. Additional means for holding the wedge elecates' any suitable supporting structure or elements in position are shown and include an outment which` may'for example be a concrete or er portion 3l having an elongated aperture 30a masonry foundation. Mounted thereon I illusthrough which passes any suitable bolt or setrate two horizontal parallel I-beams 2, the lowcuring member 32 with its nut 33. Positioned er flanges 3 of which rest upon the foundation within the space formed by the rings 2l are .I and the upper flanges Il of which serve as supremovable wear plates 3d. If desired, each bolt ports for bearing boxes generallylndicatedas 5. 32 may pass through one of these plates and Each such bearing box has positioned therewithmay thereafter perform the unitary service of in a bushing or'circumferential member of rub- "securing the plate 34 in position as well as co- 5 ber or the like 6 in which is an inner member operating with the portion 3l of the wedge 2B. 1 which receives the outer'ball or roller race 8 Additional bolts may also be employed as shown within which are the rollers 9. lll is an inner at 35 in Figure 4, with any suitable securing race associated with the shaft generally indinuts 38.

cated as ll. Said shaft has an outer extension The housing proper may be formed of opposite 50 I2 at one end on which is mounted any suitable generally vertical side Walls 3l, 38 and may exdrive pulley or pulleys i3. tend downwardly through the foundation l to 'Ihe shaft includes'a central portion I4 herein provide any suitable discharge portion 39 herein indicated as slightly enlarged in relation to the shown as having a plurality 0f inclined discharge V,outer ends of the shaft which' penetrate the surfacesdu dl.- Limiting ledges 42 extend in- 35 wardly from the side members 31, 38 and terminate closely adjacent the outer edges of the members 2l. The side elements 31, 38 are provided with apertures of sufiicient size to permit the shaft end portions Il to extend outwardly therethrough with sufficient clearance to prevent metal to metal contact at any position of the shaft and the clearance is sufficient for example to provide for whatever compression takes place of the yielding members 6.

A generally vertical feed spout 43 is indicated for example in Figure 1 having one edge M terminating closely adjacent the path of movement of the impact members and conforming to or secured to the arcuate housing member 45 which also conforms closely to the path of the beaters and may be hinged if desired as at t6 and bolted or otherwise secured in position. The opposite edge of the spout as at il is cut substantially away from the path of movement of the impact members, the two edges being connected by inclined side edges 48. It will be understood that the edge 44 is in the direction of approach of the impact members so that after the impact takes place ample space is left between the path of the impact members and the edge- 41 for the escape of the impacted particles.

I may employ any suitable normally fixed impact members for receiving the centrifugally expelled particles. I illustrate for example a plurality of removable plates 49, 5&0 which may be mounted in any suitable manner as for example on backing members 5I which may be bolted in position as by the bolts 52 with the nuts 53 at each end thereof.

It will be realized that whereas I have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic,- rather-than as limiting me to my precise showing.

The use and operation of my invention are as follows:

The material to be reduced is gravitally dropped, preferably in an unconsolidated stream, down the spout 43. The impact member is rotated at sufficient speed in relation to the acceleration by gravity of the particles to give crushing impacts of adequate force. The spacing of the impact members about the rotor is also so relatedto the speed of rotation of the impact members and to the speed of feed as to provide a non-slipping crushing impact to each particle whereby there is a minimum wear of the impact members.

'Ihe impact members are readily appliedand removed and the wedge securing means has the important result of causing the speed of rotation of the rotor itself to tighten up the wedges in response to the centrifugal outward movement of the wedges 28 in the apertures 24. The wedges can easily be loosened by loosening the nuts 33 and the inner wear plates 34 can readily be removed and replaced.

I find it advantageous to make the members 26 of such a shape as to permit their ready reversal since there is a maximum of wear in the upper portion of the impact member. After a given impact member has become somewhat worn it can readily be reversed, preferably before being worn down too far. The result is a substantial increase in economy as the manganese steel of which such members are generally made is an expensive metal and the metal cost of crushing is a substantial factor in crushing costs and thus in the efficiency of a crushing device.

I claim:

1. In an impact crusher, a rotor, and means for rotating it, said rotor including a hub having terminal portions of reduced diameter and an intermediate portion of substantially greater diameter, generally annular end plates mounted on and surrounding the hub portions of reduced diameter, and laterally abutting against the hub portion of increased diameter, apertures in said plates, and unitary wear taking plates abutting against said intermediate hub portion and including unitary lugs extending endwise outwardly into said apertures, said intermediate hub portion including radially extending members having supporting faces adapted to receive and support the rear faces of said wear taking plates.

2. In an impact crusher,. a rotor, and means for rotating it, said rotor including a hub having terminal portions of reduced diameter and an intermediate portion of substantially greater diameter, generally annular end plates mounted on and surrounding the hub portions of reduced diameter, and laterally abutting against the hub portion of increased diameter, apertures in said plates, and unitary wear taking plates abutting against said intermediate hub portion and including unitary lugs extending endwise outwardly into said apertures, said intermediate hub portion including radially extending members having supporting faces adapted to receive and support substantially the entire rear faces of said wear-taking plates, and locking members including portions penetrating said apertures and opposed to said lugs.

3. In an impact crusher, a rotor, and means for rotating it, said rotor including a hub having terminal portions of reduced diameter and an intermediate portion of substantially greater diameter, generally annular end plates mounted on and surrounding the hub portions of reduced diameter. and laterally abutting against the hub portion of increased diameter, apertures in said plates, and unitary wear taking plates abutting against said intermediate hub portion and including unitary lugs extending endwise outwardly into said apertures, said intermediate hub por- `tion including radially extending members having supporting faces adapted to receive and support substantially the entire rear faces of said wear-taking plates, and locking members including portions penetrating said apertures and opposed to said lugs, said locking members being centrifugally movable toward locking position.

4. In an impact crusher, a rotor, and means V for rotating it, said rotor including a hub having terminal portions of reduced diameter and an intermediate portion of substantially greater diameter, generally annular end plates mounted on and surrounding the hub portions of reduced diameter, and laterally abutting against the hub. portion of increased diameter, apertures in said plates, and unitary wear taking plates abutting against said intermediate hub portion and including unitary lugs extending endwise outwardly into saidy apertures, said intermediate hub portion including radially extending members having supporting faces adapted to receive and support substantially 'the entire rear faces of said wear-taking plates, and locking members including portions penetrating said apertures and opposed to said lugs, said locking members being said rings, and means for aieaeoe centrifugally movable toward locking position, the portions of said locking members which penetrate said apertures, and the apertures themselves, having opposed inclined faces adapted, in response to the centrifugal movement of said locking members, to urge said locking members laterally against said lugs.

5. In an impact crusher, a rotor including a rotor including an axially extending body portion, a plurality of generally radial projections extending outwardly therealong, rings at each end of said body portion, and unitary impact plates mounted on the faces of said projections, and having integral lugs extending into said rings, said radial projections having supporting faces adapted to receive and support substantially the entire rear faces of said unitary impact plates.

7. In an impact crusher, a rotor, bearing means therefor, and means for rotating it, said rotor including an axially extending body portion, a plurality of generally radial projections extending outwardly therealong,l rings at each end of said body portion, and unitary impact plates mounted on the faces of said projections, and having integral lugs extending into said rings, and centrifugal locking members opposed to said lugs, said radial projections having supporting faces adapted to* receive and support substantially the entire rear faces of said unitary impact plates.

8. In an impact crusher, a rotor, and means for rotating it, the rotor including a body member having generally radial projections, a plurality or impact members mountedon and circumferentially spaced about said body member, and seated on said projections, said projections having supporting faces adapted torecelve and support substantially the entire rear faces of said impact members, and means for securing said impact members in place, including centrifugally actuated wedges, movable in relation thereto, opposed to portions thereof.

9. In an impact crusher, a rotor, and means for rotating it, the rotor including a body member having'generally radial projections, a plurality of impact members mounted on and circumferentially spaced about said body member, and

seated on saidprojections, said projections having supporting faces adapted to receive and support substantially the entire rear faces of said impact members, and means for securing said impact members in place, including centrifugally actuated wedges, movable in/relationthereto, opposed toportions thereof, and Wedge abutments provided with wedge surfaces opposed to said Wedges. l y

10. In an impact crusher, a rotor and means for rotating it, said rotor including a central portion having a plurality of generally radial outward projections, generally annular apertured lend plates against which the ends of said radial.

projections abut, apertures in said end plates,

and unitary wear-taking plates abutting againstsaid radially extending projections and including unitary lugs extending endwise outwardly into the apertures of said end plates, said radially extending projections having supporting faces adapted to receive and support the rear faces of said Wear-taking plates throughout substantially their entire area.

11. In combination with the rotor of an impact crusher having a generally radial projection with a supporting face and plate locking means, a wear-taking plate abutting against suc'h supporting face throughout substantially the entire rear face of the plate, the plate including a body portion having a front impact taking face and a rearsupporting face, the two`said faces being substanuany parauei, said body portion beingf generally-rectangular and having a 'securing lug of substantially the same thickness as the plate and lying in the plane of the plate, projecting outwardly from each end thereof, substantially in the middle of such ends, and in cooperative relationship with the plate locking means.

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